Improvement in wire-fence springs



UNITED STATES PATENT OFFICE.

JOHN C. HANNA, OF DALMANUTHA, IOWA.

IMPROVEMENT IN WIRE-FENCE SPRINGS.

Specification forming part of Letters Patent No. 154,041, dated August 11, 1874; application filed November 29, 1873.

To all whom it may concern:

Be it known that I, JOHN C. HANNA, of Dalmanutha, in the county of Guthrie and State of Iowa, have invented a new and valuable Improvement in Wire-Fence Springs; and I do hereby declare that the following is afull, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings making a part of this specification, and to the letters and figures of reference marked thereon.

Figures 1 and 2 of the drawings are representations of sectional views of my wire-fence spring. Fig. 3 is a detail view of the same.

This invention has relation to springs for fence-wires; and it consists in the construction of hooked loops, in combination with a helical spring, the ends thereof being soldered to prevent spreading, for the purpose hereinafter more fully described and claimed.

The following is adescription of my improvement:

In the annexed drawings, A represents a helical spring, of proper length and strength to maintain the proper tension of a fence-wire. B B represent two long loops, the ends of which have hooks a a formed on them, which hooks engage with the ends of the spring A when they are passed through this spring in opposite directions, as shown in Figs. 1 and 2. G 0 represent the ends of a fence-wire, which are suitably secured to the loops, so that when this wire contracts it will pull on the ends of the spring in opposite directions, and thus shorten the spring. When the wire extends by heat the spring will elongate.

It will be seen that I combine, with a fencewire, a self-adjusting or compensating spring, whichwill keep such wire under proper tension, and at the same time prevent it from being broken when contracted by cold. I prevent the spring from spreading, when under compression, by soldering the ends of said springs to its last coils, and by forming the loops at a, and I thereby dispense with the washers or end plates, which are liable to slip through the coil of the spring from the contraction and expansion; thus, by bending the ends of the loops around the coil at each end of the spring, it is made more compact and durable.

I am aware that wire-fence springs have been constructed with tension-loops, having washers or plates of metal secured to the ends thereof, and drawing in opposite directions, and this I do not claim as my invention; but

What I claim as my invention is- The loops B B, having their ends a a bent hooked shape outward and backward around the end coils of the spring A, in combination with said spring, the end coils thereof being soldered to prevent spreading, as shown, and in the manner set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

JOHN CALVIN HANNA.

Witnesses:

WM. D. KELSY, WM. JoNEs. 

